1) Things end so that something else can begin.
2) Nothing really ends, it just becomes something else.
Letting go means something. Does it mean becoming stronger, or weaker, or more accepting of reality? On the reverse side of the coin, could it be driven by spite?
Maybe letting go is only that; opening your hand to let another's slide from yours. What's left could be thought of as an open palm -- an invitation.
Sometimes, a hand is just a hand. A rainstorm is just a rainstorm. Aches are only aches, and they will fade with time.